DescriptionThespesia populnea is a fast growing small tree or large shrub. It generally reaches a height of 30 feet with a spread of 12 feet. The shiny green leaves are generally oval or triangular in shape and range in size from 2 to 12 inches long. The hibiscus-like 2 to 3 inch flowers are yellow with a maroon center. (Wagner 1990)

Habitat and Geographic RangeThespesia populnea is probably indigenous to Hawai'i, but it may have been introduced by the early Polynesians. It is found throughout the tropics in coastal areas. In Hawai'i, it has been documented on all the main islands except Kaho'olawe at elevations ranging from sea level to 900 feet. (Wagner 1990)

Propagation by Seeds
The leathery seed capsules of Thespesia populnea are spherical and 1 to 2 inches in diameter. The grayish brown seeds are 1/4 to 1/2 inch long. The capsules generally open at maturity releasing about eight seeds. The capsules can also be opened by hand and the seeds removed.

The seeds should be scarified (the seed coat penetrated). This can be done using sandpaper, nail clippers, or by cracking with a hammer. Care must be taken to avoid damaging the inner part of the seed. The seeds do not require soaking. The seeds should be planted in sterile potting mix at a depth of about twice the diameter of the seed. Germination takes 14 to 28 days. (NTBG 1996; Wagner 1990)